Los Angeles County sheriff's Lt. Holly Francisco says investigators had received information that the suspect was attempting to flee to Mexico. Francisco says deputies were able to communicate with Martinez and encouraged him to turn himself in.

On Monday he arrived at the San Ysidro point of entry and surrendered.

He is suspected in the stabbing death of 63-year-old Carmen King, whose body was found by family members Feb. 20 at her home in Montebello.